Each person on a team brings a unique perspective to the process; i.e., how things work; what happens when changes are made, and how to sustain improvements during daily work. Contributions are made from each individual's skill set and the team's synthesis of ideas.
Division of labor is the economic term for the practice of assigning small parts of a complicated job to individual workers who specialize in doing just their small part.
Work Simplification: Under this method, the job is simplified by breaking it down into small sub-parts. Then, each part of the job is assigned to a worker who does the same task over and over again. This enables the worker to gain proficiency and fitness in doing the repetitive task.